Listmonk vs Sendy: Which Self-Hosted Newsletter Tool Wins?

Why Self-Hosted Newsletter Tools Matter

Listmonk and Sendy both break the SaaS mold. Neither charges per subscriber. Neither locks your data into proprietary servers.

But they make different trade-offs.

Sendy is battle-hardened. It's been in production for over a decade. Thousands of agencies and freelancers use it to manage white-label newsletters for their clients. It comes with autoresponders baked in—you don't have to wire them up yourself.

Listmonk is the new kid with a faster engine. It's built in Go instead of PHP, which means less CPU overhead, faster campaign delivery, and a leaner codebase. Its API is exceptional if you want to automate beyond the UI. And it costs nothing if you self-host it.

The real question isn't which is "better." It's which trade-off aligns with your operational capacity. Do you have time and technical skill? Listmonk wins on cost and control. Do you want autoresponders and white-label out of the box? Sendy's maturity is worth the $69.

Architecture: Modern vs Mature

Sendy runs on PHP and MySQL. This is the traditional LAMP stack: proven, widely hosted, but heavier on CPU. A small MySQL instance on a $5/month VPS will handle Sendy, but as your subscriber base grows, you'll feel the weight.

Listmonk is written in Go and uses PostgreSQL. Go compiles to a single binary, which means you can run your entire newsletter tool in 10-50 MB of RAM. PostgreSQL is faster at complex queries than MySQL. The result: Listmonk handles traffic spikes without breaking a sweat.

For small lists (under 10K subscribers), the difference is invisible. For 100K+ subscribers, Listmonk's lean footprint saves you money on hosting and keeps campaign delivery snappy.

The downside: Listmonk is younger. The community is smaller. Sendy has more third-party integrations and plugins. If you're not comfortable debugging Go code or reading GitHub issues, Sendy's PHP ecosystem may feel safer.